26 lines
730 B
Plaintext
26 lines
730 B
Plaintext
#include "../test_static.isph"
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const int64 bit_size = 64;
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const int64 a_bit_size = 3;
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const int64 max_a = 7; // must be 2^a_bit_size-1
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const int64 max_shift = bit_size - a_bit_size;
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static int64 calc_shift(int64 idx)
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{
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return (idx * (bit_size / programCount)) % (max_shift + 1);
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}
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task void f_f(uniform float RET[], uniform float aFOO[]) {
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int64 a = aFOO[programIndex];
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a = a % (max_a + 1);
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// to make a = 0bXX1
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a = a % 2 == 0 ? 1 : a;
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// If a is just 1, compiler is smart enough to eliminate count_leading_zeros.
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int64 i = a << calc_shift(programIndex);
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RET[programIndex] = count_trailing_zeros(i);
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}
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task void result(uniform float RET[]) {
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RET[programIndex] = calc_shift(programIndex);
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}
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